Apparatus for the manufacture of stannic chlorid.



W. P. DOERFLINGER.

APPARATUS'FOR THE MANUFACTURE OF STANNIG. UHLORID.

APPLICATION 11.21) rams, 191s.

if R) f a Q 1 5, AN i g 5 Ti Ii v aw/bums 5! W00 MM rmnenn, a citizen of the United chlorid by the ,paratus for the stream of anhydrous -APPARATUS FOR THE MANUFACTURE or s'rANNio CHLORID.

Specification of Letters Patent. 1908, Serial N 0. 414,299. Divided and this application filed February 1,087,437. Original application filed February 5',

Patented Feb. 1 7,1914.

5, 1913. ScrialNo. 746,254.

l bine, but I prefer to employ for the purpose To all whom it may concern Donn- States, residing at Halesite, in the county of Suffolk and State of New York, haveinvented certain new and useful Improvements in Apil'lanufacture of Stannic Chlorid, of which the following is a full, clear, and exact description.

The object of the present invention'is to provide an apparatus which while being es pecially suited for the production of stannic process described herein, is also suitable for various other processes, and certain of the parts of this be used for carrying out various other processes, particularly processes in which temperature control is necessary or desirable, and it is to ,be understood that the apparatus is not restricted toany particular use, nor to the treatment of any particular materials, but may be used for'various purposes.

In my improved process, described and claimed in my co-pending application #414,299, filed February 5th, 1908, of which the present application is a division, anhydrous stannic chlorid is procured by the action of dry chlorin gas, in the presence of stannic chlorid vapor, upon metallic. tin, preferably at a temperature of about 35 Be it known that I, \VILLIAM F.

0., the heat of reaction being dissipated by cooling surfaces near the point ofreaction and the anhydrous chlorid being allowed to drain away as formed. This stanmc chlorid,

or part of it, I use to saturate the entering chlorin gas with stannic chlorid vapor for the purpose of removing all traces of water from the chlorin. The presence of water being prejudicial, the use of stannic chlorid vapor asmentioned is desirable since, as I have found, it is difiicult otherwise to get the chlorin thoroughly dry. In fact, I have found that chlorin, even after passing through a sulfuric acid drying tower, usually contains enough moisture to interfere with the smooth course of the manufacture and often results in the formation of undesirable by-products. To saturate the chlorin with the stannic chlorid vapor I prefer to pass the chlorin in inverse direction to a stannic chlorid, on the counter-currcnt principle in the same apparatus, hereafter referred to as the absorber,

in which the tin and the dry chlorin comremoved by a separate apparatus. This apparatus 1 .term thejsatu'rator, and in this the chlorin, passing over an extended surface of liquid stannic chlorid flowing in the opposite direction, becomes saturated with stannic chlorid vapor. With the latter such mois-- ture as the chlorin may contain combines to f rm-trihydrate, which drops to the bottom and may be melted and run off from time to time. The liquid anhydrous stannic chlorid flowing from the yellow from dissolved chlorin, which may be digestion with metallic tin, in practice by simply allowingthis chlorid to flow past and in contact with the metallic tin. If the chlorid is in motion the action proceeds rapidly, but stand in contact with the tin for a long time before the chlorin is entirely removed. It is preferable to have the tin suspended in the stream instead of lying on the bottom of the apparatus below the stream, as. the former tends to make the action more rapid and complete. In the annexed drawing I have i lustrated, somewhat diagrammatically, a simple and convenient apparatus constructed in accord ance with the present invention.

The drawing shows a side view partly in vertical section of the apparatus for producing the anhydrous stannic chlorid.

absorber and saturator is' if it is quiet it may through which chlorin gas enters the system,

and passes to the saturator or drier 2. This 1s preferably provided with vertical battles of which those numbered 3 leave spaces at the top and bottom, and those numbered 4 leave spaces at the bottom only, above the surface level of the liquid stannic chlorid therein.

5 represents a gas outlet from the saturator, or drier, to the main reaction vessel, or absorber, shown at This vessel contains a temperature. regulating element 7, which may be used for removing the heat of the reaction, by supplying a cooling agent through the 'pipe' 8 which leaves through pipe 9. In addition to this, the reaction vessel is provided Wltllit temperature regulating jacket 10, which -is preferably composed of a plurality of small units, each of which has its inlet and outlet, as illu 's' trated, and by which various temperatures 

